<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>css - demo04</title>
    <style>
      .box {
        border: 1px solid #343434;
        margin: 10px;
        width: 800px;
        font-size: 20px;
        line-height: 200%;
      }
      .box > div {
        padding: 10px;
        font-size: 16px;
      }
      .item1 {
        line-height: 2;
      }
      .item2 {
        line-height: 30px;
      }
      .item3 {
      }
    </style>
  </head>
  <body>
    <div class="box">
      <div class="item1">生存还是毁灭这是一个问题</div>
    </div>
    <div class="box">
      <div class="item2">生存还是毁灭这是一个问题</div>
    </div>
    <div class="box">
      <div class="item3">生存还是毁灭这是一个问题</div>
    </div>
  </body>
</html>
